When I first started comparing Mercurial and Git, the built-in `hg serve` command that showed a repo view in the browser seemed like a killer feature. Machines running `hg serve` could even be pulled from across the network without any setup.

I mean, git had tools that could do that too, but built-in! Then I discovered GitHub.

Git is the precursor to "block chain" in utility. I was unaware of this cottage industry before now :)

Please explain the relationship between Git and Blockchain technology.

Not the person that posted this, but they both use merkle trees as their underlying data structure. In both cases you can’t rewrite the past without rewriting every successive change.

Merkle trees!